CN205154189U - Step hunch foot reinforcing apparatus in tunnel under weak geological conditions - Google Patents
Step hunch foot reinforcing apparatus in tunnel under weak geological conditions Download PDFInfo
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- CN205154189U CN205154189U CN201520955751.9U CN201520955751U CN205154189U CN 205154189 U CN205154189 U CN 205154189U CN 201520955751 U CN201520955751 U CN 201520955751U CN 205154189 U CN205154189 U CN 205154189U
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Abstract
The utility model discloses a step hunch foot reinforcing apparatus in tunnel under weak geological conditions, it belongs to mountain tunnel construction technical field, and it includes the steel bow member that is used for supporting, sets up and be in respectively in the tunnel foot reinforcing apparatus and longeron are encircleed in the expansion of the left and right both sides of steel bow member, what enlarge to encircle foot reinforcing apparatus highly all is located the upper and lower step excavation line department in tunnel, the longeron supports to enlarge along tunnel excavation tunnelling direction and encircles foot reinforcing apparatus bottom in each, it includes backup pad and bracing board to enlarge hunch foot reinforcing apparatus, the backup pad is fixed on the lateral surface that steel hunch arching rises, the both ends of bracing board respectively with lateral surface and backup pad that steel hunch arching rises are fixed, bracing board, backup pad and the steel encircles the lateral surface constitution triangle -shaped structure that arching rises. The beneficial effects of the utility model are that avoided the steel bow member and weak and produced large deformation and abrupt heavy problem owing to encircle the bottoms rock.
Description
Technical field
The utility model relates to be reinforced mountain tunnel weak surrounding rock steelframe and supports, and to be specifically related under a kind of Unfavorable geology condition step arch springing bracing means in tunnel, to belong to mountain tunnel technical field of construction.
Background technology
Weak surrounding rock generally comprises the country rock under the unfavorable geological conditions such as weakness, fragmentation, Fu Shui, but does not comprise the special country rock such as karst, gas.In recent years, along with the development of China's infrastructure construction, major long tunnel continues to bring out, and Support System in Soft Rock Tunnels large deformation control problem becomes increasingly conspicuous.Main manifestations is: deformation intrude structure ambit, spray-up come off block, supporting cracking, steelframe distortion, arch springing unstability, heave, even collapse or lining crack phenomenon in Local topography generation mill, not only have a strong impact on construction safety and construction quality, also adverse effect has been caused to construction period and investment simultaneously.
Utility model content
Technical problem to be solved in the utility model to there is provided under a kind of easy construction, safely and effectively Unfavorable geology condition step arch springing bracing means in tunnel, present arrangement avoids steel arch-shelf due to arch springing country rock weak and produce excessive deformation and prominent heavy problem.
The technical scheme that the utility model adopts is as follows:
The utility model is included in tunnel for the steel arch-shelf supported, the expansion arch springing bracing means being separately positioned on described steel arch-shelf arranged on left and right sides and longeron; The height of described expansion arch springing bracing means is all positioned at upper and lower bench excavation line place, tunnel; Described longeron is supported in bottom each expansion arch springing bracing means along tunnel excavation tunneling direction; Described expansion arch springing bracing means comprises gripper shoe and tilt prop; Described gripper shoe is fixed on the lateral surface that steel arch-shelf arches upward, and the lateral surface arched upward with described steel arch-shelf respectively in the two ends of described tilt prop and gripper shoe are fixed, and the lateral surface that described tilt prop, gripper shoe and described steel arch-shelf arch upward forms triangular structure.
Further, the utility model also comprises the lock foot anchoring stock being arranged on arch springing place below described expansion arch springing bracing means, and described lock foot anchoring stock sets and to anchor in tunnel in Unfavorable geology layer.
Further, described expansion arch springing bracing means also comprises connection backing plate, and described connection backing plate is fixed between the joint face of described tilt prop and described steel arch-shelf.
Further, described tilt prop is 18 type I shape steel plates, and described gripper shoe is steel plate, and described tilt prop and gripper shoe are welded with the lateral surface that described steel arch-shelf arches upward and formed triangular structure.
Further, described connection backing plate is steel plate, and the lateral surface arched upward with tilt prop and described steel arch-shelf respectively in the two sides of described connection backing plate welds.
Further, described longeron is 20a type channel-section steel longeron, and described longeron runs through setting along tunnel piercing direction, and described longeron is positioned at below gripper shoe.
Further, the quantity of described lock foot anchoring stock is 2, and 2 described lock foot anchoring stocks are 0 ~ 20 degree in the scope of the angle a of vertical direction.
The beneficial effects of the utility model are as follows: under Unfavorable geology condition, in tunnel, step arch springing is reinforced, adopt and expansion arch springing bracing means is set in steel arch-shelf both sides, and it is highly arranged on and is positioned at upper and lower bench excavation line place, tunnel, to control significant deflection, make country rock in appropriate deformation range, the steel arch-shelf caused because country rock is weak can be effectively avoided to sink excessive, and then cause the problem of tunnel top cave-in accident, decrease potential safety hazard, avoid casualties and device damage.
Accompanying drawing explanation
Fig. 1 is the installment state schematic diagram in tunnel of the present utility model.
Fig. 2 is structure chart of the present utility model.
Wherein, 1 advance support steel tube shed, 2 anchor poles, 3 steel arch-shelf, 4 expand arch springing bracing means, 5 bolt-spary supportss, 6 inverted arch, 7 splash guards, 8 lining cutting, 9 longerons, 10 connection backing plates, 11 lock foot anchoring stocks, 12 tilt props, 13 gripper shoes, 14 part, 15 of topping bar gets out of a predicament or an embarrassing situation part, 16 upper and lower bench excavation lines.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 ~ 2 and embodiment, the utility model is further described.
See Fig. 1, Fig. 2, the present embodiment is included in tunnel for the steel arch-shelf 3 supported, the expansion arch springing bracing means 4 being separately positioned on described steel arch-shelf 3 arranged on left and right sides and longeron 9; The height of described expansion arch springing bracing means 4 is all positioned at upper and lower bench excavation line 16 place, tunnel; Described longeron 9 is supported in bottom each expansion arch springing bracing means 4 along tunnel excavation tunneling direction; Described expansion arch springing bracing means 4 comprises gripper shoe 13 and tilt prop 12; Described gripper shoe 13 is fixed on the lateral surface that steel arch-shelf 3 arches upward, the lateral surface arched upward with described steel arch-shelf 3 respectively in the two ends of described tilt prop 12 and gripper shoe 13 are fixed, and the lateral surface that described tilt prop 12, gripper shoe 13 and described steel arch-shelf 3 arch upward forms triangular structure.
Further, the utility model also comprises the lock foot anchoring stock 11 being arranged on arch springing place below described expansion arch springing bracing means 4, and described lock foot anchoring stock 11 sets and to anchor in tunnel in Unfavorable geology layer.
Further, described expansion arch springing bracing means 4 also comprises connection backing plate 10, and described connection backing plate 10 is fixed between described tilt prop 12 and the joint face of described steel arch-shelf 3.
Further, described tilt prop 12 is 18 type I shape steel plates, and described gripper shoe 13 is steel plate, and described tilt prop 12 and gripper shoe 13 are welded with the lateral surface that described steel arch-shelf 3 arches upward and formed triangular structure.
Further, described connection backing plate 10 is steel plate, and the lateral surface arched upward with tilt prop 12 and described steel arch-shelf 3 respectively in the two sides of described connection backing plate 10 welds.
Further, described longeron 9 is 20a type channel-section steel longeron, and described longeron 9 runs through setting along tunnel piercing direction, and described longeron 9 is positioned at below gripper shoe 13.
Further, the quantity of described lock foot anchoring stock 11 is 2, and 2 described lock foot anchoring stocks 11 are 20 degree at the angle a of vertical direction; Or 2 described lock foot anchoring stocks 11, are namely horizontally disposed with without angle at vertical direction; Or 2 described lock foot anchoring stocks 11 are 10 degree at the angle a of vertical direction.
Further, described lock foot anchoring stock 11 is hollow lock foot anchoring stock.
As shown in Figure 1; installation position and the time of laying of the present embodiment are as follows: tunnel adopts benching tunnelling method excavation, before excavation, first perform advance support steel tube shed 1, and under the protection of described advance support steel tube shed 1, excavation tops bar 14; set anchor pole 2, erection steel arch-shelf 3 simultaneously.So far, in order to prevent because excavation span is excessive or steel arch-shelf 3 excessive convergence, and then cause tunnel vault to cave in unstability calmly, at 14 and the position of getting out of a predicament or an embarrassing situation between 15 and the upper and lower bench excavation line 16 of topping bar, therefore expansion arch springing bracing means 4 is set respectively in described upper and lower bench excavation line 16 both sides, to stable arch springing, final stabilized steel bow member 3.Then, complete top bar 14 the construction of bolt-spary supports 5, i.e. preliminary bracing.Afterwards, excavation gets out of a predicament or an embarrassing situation 15, apply get out of a predicament or an embarrassing situation 15 bolt-spary supports 5 and inverted arch 6, treat domain excavation, after bolt-spary supports 5, apply splash guard 7 and lining cutting 8.
Further, described expansion arch springing bracing means 4 comprises the tilt prop 12 of the 18 type i shaped steel materials of welding with steel arch-shelf 3, and described steel arch-shelf 3 and tilt prop 12 weld set up the connection backing plate 10 of the steel matter of 24 × 30 × 1.6cm; Described 20a type channel-section steel longeron welds with tilt prop 12, and connecting portion sets up the gripper shoe 13 of the steel matter of 24 × 30 × 1.6cm, and connected mode is welding, and gripper shoe 13 is welded with the steel arch-shelf 3 in bolt-spary supports 5 simultaneously.Add 2 lock foot anchoring stocks 11 in the bottom expanding arch springing bracing means 4, the diameter of described lock foot anchoring stock 11 is determined according to site operation situation, and the angle of 2 lock foot anchoring stocks 11 is 20 degree.
Certainly, those skilled in the art in the art will be appreciated that, above-described embodiment is only used to the utility model is described, and be not used as restriction of the present utility model, as long as in spirit of the present utility model, the change, modification etc. of above-described embodiment all will be dropped in the scope of the utility model claim.
Claims (7)
1. a step arch springing bracing means in tunnel under Unfavorable geology condition, is characterized in that: it is included in tunnel for the steel arch-shelf (3) supported, the expansion arch springing bracing means (4) being separately positioned on described steel arch-shelf (3) arranged on left and right sides and longeron (9); The height of described expansion arch springing bracing means (4) is all positioned at upper and lower bench excavation line (16) place, tunnel; Described longeron (9) is supported in each expansion arch springing bracing means (4) bottom along tunnel excavation tunneling direction; Described expansion arch springing bracing means (4) comprises gripper shoe (13) and tilt prop (12); Described gripper shoe (13) is fixed on the lateral surface that steel arch-shelf (3) arches upward, the lateral surface arched upward with described steel arch-shelf (3) respectively in the two ends of described tilt prop (12) and gripper shoe (13) are fixed, the lateral surface formation triangular structure that described tilt prop (12), gripper shoe (13) and described steel arch-shelf (3) arch upward.
2. step arch springing bracing means in tunnel under a kind of Unfavorable geology condition according to claim 1, it is characterized in that: it also comprises the lock foot anchoring stock (11) being arranged on arch springing place, described expansion arch springing bracing means (4) below, described lock foot anchoring stock (11) sets and to anchor in tunnel in Unfavorable geology layer.
3. step arch springing bracing means in tunnel under a kind of Unfavorable geology condition according to claim 1, it is characterized in that: described expansion arch springing bracing means (4) also comprises connection backing plate (10), and described connection backing plate (10) is fixed between the joint face of described tilt prop (12) and described steel arch-shelf (3).
4. step arch springing bracing means in tunnel under a kind of Unfavorable geology condition according to claim 3, it is characterized in that: described tilt prop (12) is 18 type I shape steel plates, described gripper shoe (13) is steel plate, and described tilt prop (12) and gripper shoe (13) are welded with the lateral surface that described steel arch-shelf (3) arches upward and formed triangular structure.
5. step arch springing bracing means in tunnel under a kind of Unfavorable geology condition according to claim 4, it is characterized in that: described connection backing plate (10) is steel plate, the lateral surface arched upward with tilt prop (12) and described steel arch-shelf (3) respectively in the two sides of described connection backing plate (10) welds.
6. step arch springing bracing means in tunnel under a kind of Unfavorable geology condition according to claim 1, it is characterized in that: described longeron (9) is 20a type channel-section steel longeron, described longeron (9) runs through setting along tunnel piercing direction, and described longeron (9) is positioned at gripper shoe (13) below.
7. step arch springing bracing means in tunnel under a kind of Unfavorable geology condition according to claim 2, it is characterized in that: the quantity of described lock foot anchoring stock (11) is 2,2 described lock foot anchoring stocks (11) are 0 ~ 20 degree in the scope of the angle a of vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520955751.9U CN205154189U (en) | 2015-11-26 | 2015-11-26 | Step hunch foot reinforcing apparatus in tunnel under weak geological conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520955751.9U CN205154189U (en) | 2015-11-26 | 2015-11-26 | Step hunch foot reinforcing apparatus in tunnel under weak geological conditions |
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| Publication Number | Publication Date |
|---|---|
| CN205154189U true CN205154189U (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520955751.9U Expired - Fee Related CN205154189U (en) | 2015-11-26 | 2015-11-26 | Step hunch foot reinforcing apparatus in tunnel under weak geological conditions |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321120A (en) * | 2016-08-25 | 2017-01-11 | 中国十七冶集团有限公司 | Weak surrounding rock tunnel steel shotcrete large skewback device |
| CN106529002A (en) * | 2016-11-04 | 2017-03-22 | 长安大学 | Design analysis method for auxiliary support system of tunnel steel frame |
| CN106988767A (en) * | 2017-04-06 | 2017-07-28 | 铁道第三勘察设计院集团有限公司 | The Support System in Soft Rock Tunnels supporting construction of buried Central drain |
| CN109989777A (en) * | 2019-04-03 | 2019-07-09 | 中铁十八局集团有限公司 | The method for being squeezed and deformed Duan Chuzhi large deformation for controlling the small mileage in tunnel |
| CN113482671A (en) * | 2021-08-24 | 2021-10-08 | 甘肃省交通规划勘察设计院股份有限公司 | Construction method for restraining sinking amount of primary support of tunnel based on step method excavation |
-
2015
- 2015-11-26 CN CN201520955751.9U patent/CN205154189U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321120A (en) * | 2016-08-25 | 2017-01-11 | 中国十七冶集团有限公司 | Weak surrounding rock tunnel steel shotcrete large skewback device |
| CN106529002A (en) * | 2016-11-04 | 2017-03-22 | 长安大学 | Design analysis method for auxiliary support system of tunnel steel frame |
| CN106529002B (en) * | 2016-11-04 | 2019-11-08 | 长安大学 | A kind of Design and analysis methods of tunnel steelframe Auxiliary support system |
| CN106988767A (en) * | 2017-04-06 | 2017-07-28 | 铁道第三勘察设计院集团有限公司 | The Support System in Soft Rock Tunnels supporting construction of buried Central drain |
| CN109989777A (en) * | 2019-04-03 | 2019-07-09 | 中铁十八局集团有限公司 | The method for being squeezed and deformed Duan Chuzhi large deformation for controlling the small mileage in tunnel |
| CN109989777B (en) * | 2019-04-03 | 2020-06-09 | 中铁十八局集团有限公司 | Method for controlling initial support large deformation of tunnel small-mileage extrusion deformation section |
| CN113482671A (en) * | 2021-08-24 | 2021-10-08 | 甘肃省交通规划勘察设计院股份有限公司 | Construction method for restraining sinking amount of primary support of tunnel based on step method excavation |
| CN113482671B (en) * | 2021-08-24 | 2024-03-15 | 兰州交通大学 | Construction method for restraining tunnel primary support sinking based on step method excavation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20161126 |